Mohammad Shafia, convicted along with his wife and son of murdering four family members, is being sued for allegedly reneging on a promise to sell one of his properties.

According to court documents, Shafia changed his mind about selling the building located north of Montreal unless the buyer increased the price by $60,000, Richard Dormoy claims that his $2.25 million offer for one of Shafia's properties was accepted. Dormoy also says he paid a $100,000 deposit in a trust account on Feb. 8 as part of the condition of sale.

However, Dormoy alleges that a representative for the convicted killer said the accepted offer was invalid because a new person was mandated to handle Shafia's affairs.

Shafia allegedly told Dormoy that he was ready to sell the property "if the price of sale is increased by $60,000" - or else another offer would be considered.

Dormoy claims that Shafia and his representatives "are trying to flaunt the law to get more money."

He is suing Shafia for the property - at the allegedly accepted offer of $2.25 million - plus $10,000 for troubles and inconveniences.

Shafia, his wife Tooba Mohammad Yahya, and their son Hamed, were convicted in Kingston on Jan. 29 for the murders of four family members.

On June 30, 2009, the bodies of three of Shafia's daughters - Zainab, 19, Sahar, 17, and Geeti, 13, as well as that of Rona Amir Mohammad, 52, - Mohammed Shafia's first wife - were found dead, underwater in the family's car at the Kingston Mills locks on the Rideau Canal.